The Flash executive producer Andrew Kreisberg teases the mid-season finale reveal as well as what we can expect when the show returns in 2015.

Warning: This article contains spoilers for The Flash season 1, episode 9, “The Man in the Yellow Suit.”

The Flash mid-season finale dealt with Barry Allen coming face to face with the man who killed his mother — the man in the yellow suit, aka the Reverse Flash. And in the final moments of the episode, we seemingly learned who the mysterious speedster is: Dr. Harrison Wells.

But wait, we had a confrontation that put the Reverse Flash and his suspected identities — Wells and Eddie Thawne — in the same room at the same time. Furthermore, Cisco revealed to Joe that there must have been two speedsters present on the night Barry’s mother died — the Reverse Flash and someone else.

Another reveal in the mid-season finale was that Caitlin’s fiance, Ronnie Raymond, is in fact alive and is now a metahuman.

If your head is spinning at this point, you’re not alone!

“There are a couple of big things happening in episode nine. While they come to a dramatic conclusion, these events are going to echo throughout the rest of the season,” Kreisberg says. “When we come back people are going to be excited.”

Kreisberg adds, “We really wanted this show to be exciting and be a roller coaster ride and part of that is you can’t just tick off mysteries and never solve them. For us, it’s really important to reward the audience for faithful viewership. We want to set up new mysteries and reveal how they affect all of the characters.”

Kreisberg also gives credit to the CW for the extra two minutes of running time for the mid-season finale. “They are so incredibly supportive, and for them to give us that extra time is amazing to us. They saw an early cut of the show that was considerably longer and they said they wanted to keep as much as we can. Without generosity and spirit on their part, some of the really special moments would have been lost.”

As for 2015, as we saw in the promo, we’ll be seeing a villain teamup: Captain Cold and Heat Wave. “We have a Prison Break reunion with Dominic Purcell and Wentworth Miller,” Kreisberg previews.

The Flash returns with new episodes on Tuesday, January 20 at 8:00 p.m. ET on The CW.